单项选择题

[听力原文]6-7
W: Mr. Smith, did you know it’s in fashion to keep a pet dog nowadays
M: Yes, but pet dogs are not easy to find in our country.
W: Why not import one
M: Well, if I want to import one, it will have to go into quarantine for six months.
W: Go into what
M: A quarrantine. In other words, it must be kept in isolation until the authorities are certain that it is not carrying any diseases.

What is in fashion these days（）

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